A new 1D Cd(II) pyridinate polymer: Structure, second-harmonic generation response, dielectric and potential ferroelectric properties

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• 作者：Wei-Wei Zhou^a ; ^{wwz9829@126.com} ; Wang Zhao^a ; Bo Wei^b ; Feng-Wu Wang^a ; Yong-Hong Chen^a ; Wen-Yan Fang^a ; Xing Zhao^a
• 关键词：Nonlinear optical property ; Dielectric property ; Ferroelectric behavior ; Cadmium ; 2-Amino-5-nitropyridine ; Metal&ndash ; organic coordination polymer
• 刊名：Inorganica Chimica Acta
• 出版年：2012
• 期刊代码：40_00201693
• 类别：ch
• 出版时间：15 May, 2012
• 卷：386
• 期：Complete
• 页码：17-21
• 文件大小：635 K

摘要

A novel 1D polymer, [Cd(anp)₂Br₂]路H₂O (1) (anp = 2-amino-5-nitropyridine), was synthesized through the solvothermal reaction of CdBr₂路4H₂O with anp. The main feature of 1 is a -Br-Cd(anp)₂-Br- chain-like structure, which is formed by [anp-Cd-anp] subunits linked via 渭₂-Br bridges. The 1D chains are further assembled to form a 3D supramolecular architecture through hydrogen bondings. The one-center-A (acceptor)-D (donor) organic building blocks and non-centrosymmetric polar packing arrangement of 1 give rise to a dipole moment along the c-direction, enhancing the hyperpolarizability and thus resulting in a strong second-harmonic generation (SHG) response. The peak of temperature dependence of the dielectric constant of 1 indicates the Curie temperature T_C of 138 掳C (at 1 kHz). Moreover, complex 1 also exhibits potential ferroelectric properties.